Ammonia-compressor.



. PLTENTEDJULY 2, 1907. P. A. RIDER. AMMONIA comansson. AYPLIULTIUI FILED AUG. 29, 1906 I 2 snzms snnm z, y

INVENTOR I f A Home WITNESSES nnrrnn errirne Prrrnn'r onnron.

FRANK A. RIDER, OF PITTSBURG, PENNSYLVANIA.

Specification of Letters Patent. Ai plioationfiled August 29,1906. Serial No. 33%514.

AMMONIA-COMTPRESSOB.

Patented July 2, i907.

To'all whom it may} concern:

Be it known thet I, FRANK A. RIDER, a resident of Pittsbnrg, in the county of Xllegheny and State of Pennsylvania, have invented'certain new and useful Improvements in Ammonia-Compressors; and I do hereby'declare the-following to be ai'full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertsins to make and use the some. 1

Myinvention relates to an improved ammonia coinpressor, the object of the invention being to provide improvements of this character which will. maintain the cylinder cool by the incoming gas, and also provide an improved-piston constructed to form '2, gas cushion preventing pounding and jar to the parts of the piston. I

With these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements oi'parts as will no more fully hereinafter tleecribed. and pointed out in' the claims;

In the accompanying drawings, Figure 1 is a view in longitudinal section illustrating my improvements,

and Fig. 2 is an'enlarged view in longitudinal section 2 oi the piston.

. 1' represents the engine bed, which is made with o cylindrical recess or chamberto receive the inner end of the cylinder 2, and provide an annular chamber 3 all around this open inlet end of: cylinder 2, fortho cold 3i) ammonia. gee before it enters the open end of the cylinder, keeping that portion of the cylinder as cold as possible to prevent the expansion of the entering gas, which enters the chamhertlirough the inlet 4 located back of the inlet-end of the'cylinder to compel the cold gate to completely encircle the cylinder before ontering the open end thereof. v

A stufiing box 5 is provided at the end of chamber 3, for the piston rod 6, and the chamber 3 also serves-as an oil trapto collect oil from tho stufling box and. prevent its entrance into cylinder 2, the oil beingdmvrnoff through a. pipe 7 having a valve 8 therein.

9 represents my improved piston, reciprocated in the cylinder 2, by the rod 6, on which latter, the valve 10 is secured to alternately open and close the end of the piston. The valve 1D and rod 6 are guided in their movement in main piston 9 by askeleton guide piston 11, which latter is made with an annular recess or groove 12 in its end, and this grooved or recessed end of the guide piston cooperates with on internal flange 13 on the end of main piston 9, to form a gas cushion at 14, to prevent jar and shock, as the rod moves back to ':1 bed provided with a closed chemhcr constructed to recoive the open end of the cyliudcrund form a gas receivcloser! chamber, a piston passing through the cylinder, 8. .ou rod in the stufliug box and connected with the plston, and u valved oil outlet in the lower portionof said chamber.

.3. In a compressor, the combination with a cylinder, of V a piston therein, a piston rod, :1 valve on said l ()(1 to open mid close :1 passage through the piston, a skeleton uide piston on the rod movable in the muiu piston, an internal flange or Sll0lll(1(i fil\ the main piston to limit; the movcmerit of the guide piston in the main piston, and suill guide piston having a groove or recess in He end coiiporub hug willr the interim! ilunge to form :1 gas cushion.

In testimony whereof, l have signed this specification in the presence of two sulw-rlhlug witnesses.

FRANK A. lumen. Wltncsses A. M. CAMPBELL, B, G. Menus. 

